轨距传感器中激光光斑大小的影响

Research on the Gauge Sensor Laser Spot

文中基于四象限光电探测器和三角测量方法,经过相似三角形的近似处理,提出了一种用于铁轨轨道几何参数检测的新型激光位移传感器。该传感器与其他方法不同之处是:激光器采用红外脉冲半导体激光器,这样避免了外界杂散光的影响;探测器采用四象限光电探测器,响应频率高,避免了外界温度的干扰。重点分析和研究了激光器光斑,物体表面激光光斑和四象限探测器探测的激光光斑大小的计算。从而调节激光器到一个最佳的位置。

Based on the quadrant photodiode detector and triangulation method, a novel laser displacement sensor wis proposed for the gauge measurement. The laser sensor adopts the infrared laser and the quadrant photodiode to avoid the disturb. To adjust the infrared laser to the optimal place, we analyze and calculate the relation between the laser spot and the laser place.